ANAEROBIC WASTE WATER TREATMENT APPARATUS

摘要

PURPOSE:To obtain good treated water by preventing the carry-over of granules by arranging excessive sludge withdrawing pipes in the vicinity of the bottom part of an anaerobic reactor and in the vicinity of the part below the interface above which methane fermentation bacteria are fluidized in an org. waste water treatment apparatus. CONSTITUTION:The waste water supplied to the lower part of an anerobic reactor 2 by a raw water pump 1 flows to the upper part in the anaerobic reactor 2 and the org. matter in the waste water is decomposed by granules 4 to purify the waste water. Methane or carbon dioxide generated by the decomposition of the org. matter is stored in a gas holder 8 through a fermentation gas pipeline 7 to be utilized as fuel. Purified water is discharged out of the system from a treated water pipeline 9. Excessive propagated granules are withdrawn from the withdrawing pipeline 11a in the vicinity of the bottom part of the anaerobic reactor 2 and the withdrawing pipeline 11b in the vicinity of the part below the interface above which methane fermentation bacteria in a reaction part 3 are fluidized to be transferred to a sludge treatment factory such as a dehydration treatment factory. By this constitution, collapsed granules or non-granulated bacteria are discharged out of the system to prevent carry-over.